Who doubts? Most English translations render v. 17: "When they saw him, they worshiped him; but some doubted" (NRSV). However, the word "some" doesn't occur in the text. The little Greek word de is often translated "but," but it can also mean "and". With this understanding, the verse could be translated: "And seeing him they worshiped and they doubted."
Those who worship are also those who doubt -- like being simultaneously saint and…
ChristianGlobe Networks, Inc., Exegetical Notes, by Brian Stoffregen